Trifluoroacetic acid → 3-Methoxy-4-methoxycarbonylcinnamic acid

Participants

Reaction Steps

To a solution of t-butyl 3-methoxy-4-methoxycarbonylcinnamate (23.5 g) in anhydrous dichloromethane (100 ml) is added trifluoroacetic acid (50 ml) under ice-cooling, and the mixture is stirred at room temperature overnight. The reaction solution is concentrated under reduced pressure to remove the solvent, and the residue is crystallized from ethanol to give 3-methoxy-4-methoxycarbonylcinnamic acid (8.35 g).

Provenance & Evidence